Hi!
Greetings from Sweden! I'm new here and new to old Yamaha receivers. This is also my first post. A while back I managed to lay my hands on an CR-820. It was bought an online thrift shop. It was a long shot, since I did not know about its internal condition, but what caught my eye was the outward condition was close to mint, looking at the pictures. So I went ahead and bought it. The intial prize was about 260 USD. However, as it turned out it was basically "dead" upon arrival. The only thing lighting up was the red diods, no sound from the speakers nor the headphone jack. Beacuase of this I managed to negotiate it down to 60$, since it basically was a non working unit that they had sold to me. If that is a ggod or bad thing remains to be seen.
I have read up on refurbisihing this kind of receivers on this forum. From what I have understood, this can be related to the protection curcuit being engaged. I have ordered a refurbishing kit to swap all the capacitors, starting on on the power supply and working my way down to the amplifier section, one bit at a time until the whole unit is done. Of course also clean the pots and push buttons. Also using a DBT. My intital question to this forum is as follows.
Are there any useful test I can do prior to starting the swapping process?
What other general recommenations do you have that would help me as far as determening what is wrong with the unit? Or, is the best route to start swapping components right away and see what happens? I do have some basic knowledge in electronics back from my school days, so I can work a multimeter etc. I do not have an ocsilloscope at this point.
Thank you for guiding me through this!
Greetings from Sweden! I'm new here and new to old Yamaha receivers. This is also my first post. A while back I managed to lay my hands on an CR-820. It was bought an online thrift shop. It was a long shot, since I did not know about its internal condition, but what caught my eye was the outward condition was close to mint, looking at the pictures. So I went ahead and bought it. The intial prize was about 260 USD. However, as it turned out it was basically "dead" upon arrival. The only thing lighting up was the red diods, no sound from the speakers nor the headphone jack. Beacuase of this I managed to negotiate it down to 60$, since it basically was a non working unit that they had sold to me. If that is a ggod or bad thing remains to be seen.
I have read up on refurbisihing this kind of receivers on this forum. From what I have understood, this can be related to the protection curcuit being engaged. I have ordered a refurbishing kit to swap all the capacitors, starting on on the power supply and working my way down to the amplifier section, one bit at a time until the whole unit is done. Of course also clean the pots and push buttons. Also using a DBT. My intital question to this forum is as follows.
Are there any useful test I can do prior to starting the swapping process?
What other general recommenations do you have that would help me as far as determening what is wrong with the unit? Or, is the best route to start swapping components right away and see what happens? I do have some basic knowledge in electronics back from my school days, so I can work a multimeter etc. I do not have an ocsilloscope at this point.
Thank you for guiding me through this!
